package com.sky.service.impl;


import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import net.bytebuddy.asm.Advice;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WorkspaceService workspaceService;

    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);

        while(!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }

        List<Double> turnoverList=new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime=LocalDateTime.of(date,LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(date,LocalTime.MAX);
            Map map=new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover=orderMapper.sumByMap(map);
            //判空，null拼接至字符串不太合理我们改用0.0
            turnover=turnover == null ? 0.0 :turnover;
            turnoverList.add(turnover);
        }

        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnoverList, ","))
                .build();
    }

    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        //获取日期列表
        List<LocalDate>dateList=new ArrayList<>();
        for(LocalDate i=begin;i.isBefore(end.plusDays(1));i=i.plusDays(1)){
            dateList.add(i);
        }
        //
        List<Integer>totalUserList=new ArrayList<>();
        List<Integer> newUserList=new ArrayList<>();
        int sum=0;
        for (LocalDate date : dateList) {
             LocalDateTime beginTime=LocalDateTime.of(date,LocalTime.MIN);
             LocalDateTime endTime=LocalDateTime.of(date,LocalTime.MAX);
             Map map=new HashMap();
             map.put("begin",beginTime);
             map.put("end",endTime);
             Integer totalUser=userMapper.countByMap(map);
             totalUser=totalUser==0?0:totalUser;
             totalUserList.add(totalUser);
             sum+=totalUser;
             newUserList.add(sum);
        }

        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .build();
    }

    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        //获取日期列表
        List<LocalDate> dateList=new ArrayList<>();
        for(LocalDate i=begin;i.isBefore(end.plusDays(1));i=i.plusDays(1)){
            dateList.add(i);
        }
        //订单总数
        List<Integer> totalOrderCount=new ArrayList<>();
        List<Integer> validOrderCount=new ArrayList<>();
        int sumValid=0;
        int sumInvalid=0;
        double orderCompletionRate;
        for(LocalDate date:dateList){
            //统计有效订单总数
            LocalDateTime beginTime=LocalDateTime.of(date,LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(date,LocalTime.MAX);
            Map mapV=new HashMap();
            mapV.put("begin",beginTime);
            mapV.put("end",endTime);
            mapV.put("status", Orders.COMPLETED);
            Integer orderCountV=orderMapper.countByValidMap(mapV);
            orderCountV=orderCountV==null?0:orderCountV;
            sumValid+=orderCountV;
            validOrderCount.add(sumValid);
            //统计订单总数
            Map mapNV=new HashMap();
            mapNV.put("begin",beginTime);
            mapNV.put("end",endTime);
            Integer orderCountNV=orderMapper.countByInvalidMap(mapNV);
            orderCountNV=orderCountNV==null?0:orderCountNV;
            sumInvalid+=orderCountNV;
            totalOrderCount.add(sumInvalid);
        }
        orderCompletionRate=sumValid*1.0/sumInvalid;
        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCompletionRate(orderCompletionRate)
                .orderCountList(StringUtils.join(totalOrderCount, ","))
                .totalOrderCount(sumInvalid)
                .validOrderCount(sumValid)
                .validOrderCountList(StringUtils.join(validOrderCount, ","))
                .build();
    }

    @Override
    public SalesTop10ReportVO getTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin,LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end,LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10=orderMapper.getSalesTop10(beginTime,endTime);
        List<String>names=salesTop10.stream().
                map(GoodsSalesDTO::getName).
                collect(Collectors.toList());

        String nameList =StringUtils.join(names, ",");
        List<Integer>collect =salesTop10.stream()
                .map(GoodsSalesDTO::getNumber)
                .collect(Collectors.toList());
        String numberList =StringUtils.join(collect, ",");
        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

    //TODO 学完流回来复习
    @Override
    public void exportBusinessData(HttpServletResponse response) {
        //查数据库获取数据,查最近30天的数据。
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        BusinessDataVO businessDataVO=workspaceService.getBusinessData(LocalDateTime.of(dateBegin,LocalTime.MIN),LocalDateTime.of(dateEnd,LocalTime.MAX));

        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            XSSFWorkbook excel = new XSSFWorkbook(in);
            XSSFSheet sheet = excel.getSheet("Sheet1");
            sheet.getRow(1).getCell(1).setCellValue("时间:"+dateBegin+"~"+dateEnd);
            XSSFRow row=sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            row=sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            for(int i=0;i<30;i++){
                LocalDate date = dateBegin.plusDays(i);
                workspaceService.getBusinessData(LocalDateTime.of(date,LocalTime.MIN),LocalDateTime.of(date,LocalTime.MAX));
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessDataVO.getTurnover());
                row.getCell(3).setCellValue(businessDataVO.getValidOrderCount());
                row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessDataVO.getUnitPrice());
                row.getCell(6).setCellValue(businessDataVO.getNewUsers());
            }

            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            out.close();
            excel.close();
        }catch(Exception e) {
            e.printStackTrace();
        }

    }
}
